13319391 has 4 divisors (see below), whose sum is σ = 17759192. Its totient is φ = 8879592.

The previous prime is 13319363. The next prime is 13319431. The reversal of 13319391 is 19391331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19391331 = 3 ⋅6463777.

It is not a de Polignac number, because 13319391 - 2⁵ = 13319359 is a prime.

It is a super-2 number, since 2×13319391² = 354812353221762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13319311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2219896 + ... + 2219901.

It is an arithmetic number, because the mean of its divisors is an integer number (4439798).

Almost surely, 2^13319391 is an apocalyptic number.

13319391 is a deficient number, since it is larger than the sum of its proper divisors (4439801).

13319391 is an equidigital number, since it uses as much as digits as its factorization.

13319391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4439800.

The product of its digits is 2187, while the sum is 30.

The square root of 13319391 is about 3649.5740847392. The cubic root of 13319391 is about 237.0435391533.

It can be divided in two parts, 1331 and 9391, that multiplied together give a palindrome (12499421).

The spelling of 13319391 in words is "thirteen million, three hundred nineteen thousand, three hundred ninety-one".